From: Mark A. Greer <mgreer@animalcreek.com>
Date: Tue, 2 Sep 2014 22:12:38 +0000 (-0700)
Subject: NFC: trf7970a: Delay after initialization
X-Git-Tag: v4.9.8~5486^2~75^2~80^2~43
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=4e007f810664541078e619d050f6290bf137aa61;p=platform%2Fkernel%2Flinux-rpi3.git

NFC: trf7970a: Delay after initialization

The trf7970a should be given at least 1 ms to
completely initialize after the 'Software Init'
and 'Idle' commands have been issued.

Signed-off-by: Mark A. Greer <mgreer@animalcreek.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
---

diff --git a/drivers/nfc/trf7970a.c b/drivers/nfc/trf7970a.c
index 3859e02..b2d0fbf 100644
--- a/drivers/nfc/trf7970a.c
+++ b/drivers/nfc/trf7970a.c
@@ -824,6 +824,8 @@ static int trf7970a_init(struct trf7970a *trf)
 	if (ret)
 		goto err_out;
 
+	usleep_range(1000, 2000);
+
 	ret = trf7970a_write(trf, TRF7970A_MODULATOR_SYS_CLK_CTRL, 0);
 	if (ret)
 		goto err_out;